/*
 * Open Source Physics software is free software as described near the bottom of this code file.
 *
 * For additional information and documentation on Open Source Physics please see:
 * <http://www.opensourcephysics.org/>
 */

package org.opensourcephysics.tools;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;

/**
 * A checkbox tree cell renderer.
 * 
 * @author Doug Brown
 * 
 * Based on code by Santhosh Kumar T - santhosh@in.fiorano.com
 * See http://www.jroller.com/page/santhosh/20050610
 */
public class CheckTreeCellRenderer extends JPanel implements TreeCellRenderer{ 
  private CheckTreeSelectionModel selectionModel; 
  private TreeCellRenderer delegate; 
  private TristateCheckBox checkBox = new TristateCheckBox(); 

  public CheckTreeCellRenderer(TreeCellRenderer delegate, CheckTreeSelectionModel selectionModel){ 
      this.delegate = delegate; 
      this.selectionModel = selectionModel; 
      setLayout(new BorderLayout()); 
      setOpaque(false); 
      checkBox.setOpaque(false); 
  } 


  public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus){ 
      Component renderer = delegate.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus); 
      TreePath path = tree.getPathForRow(row); 
      if(path!=null){ 
        if(selectionModel.isPathOrAncestorSelected(path)) 
          checkBox.setState(TristateCheckBox.SELECTED); 
        else 
          checkBox.setState(selectionModel.isPathUnselected(path)? 
              				TristateCheckBox.NOT_SELECTED : 
              				TristateCheckBox.PART_SELECTED); 
      } 
      removeAll(); 
      add(checkBox, BorderLayout.WEST); 
      add(renderer, BorderLayout.CENTER); 
      return this; 
  } 
} 
/*
 * Open Source Physics software is free software; you can redistribute
 * it and/or modify it under the terms of the GNU General Public License (GPL) as
 * published by the Free Software Foundation; either version 2 of the License,
 * or(at your option) any later version.

 * Code that uses any portion of the code in the org.opensourcephysics package
 * or any subpackage (subdirectory) of this package must must also be be released
 * under the GNU GPL license.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
 * or view the license online at http://www.gnu.org/copyleft/gpl.html
 *
 * Copyright (c) 2007  The Open Source Physics project
 *                     http://www.opensourcephysics.org
 */
